The « Optical Group » is dedicated to spectroscopy studies with diffraction gratings secondary lenses mountable on cameras.
Set up of an optic bench
February 13th, 2012
Bringing into operation our spectroscopic test bench allows calibrating and studying the optical quality of various imaging devices available on the market, as well as a comparing the different existing diffraction gratings. The goal is to determine the optimal characteristics of operating conditions.
Along with our analysis soft wares, this system allows a very precise identification of spectral lines.
|
Compact fluorescent bulb spectrum |
Neon lamp Spectrum |
 |
 |
 |
Characteristics comparison of 3 different diffraction grating types
Spectral lines identification sharpness.
V.I.G.I.E Project
September 14th, 2011
During the last days, many tests done with the software Théodolite, for IPhone and IPad, associated to some works of our own on GoogleMap application, have shown that a large number of technical solutions can be found to allow large scale management of spectrum data potentially acquired from UFO observations.
Toward a centralized and automated processing of photographic data
In order to set up a structure able to centralize technical and spectral data, we here announce the launch of the project : V.I.G.I.E : “Visual Integrated Geolocalisation for Identification Experiment“.
See the dedicated page.
Diffraction gratings Geolocation
September 12th, 2011
Since 2007, many diffraction gratings have been distributed worlwide, in more than 25 countries. Two models of diffraction gratings are circulating: one as a slide frame, the other one as an adhesive cap for mobile phone. To better visualize the distribution of them, each grating has been geolocalized from the zip code used for sending. View the map.
Bonnettes à réseau adhésives disponibles
November 4th, 2010
The adhesive diffraction grating for Cellular, are now on sale at a price of 10 € plus shipping of 3.25 €.
Visit the dedicated page for more information.
To satisfy the greatest number of requests, one item per order will be recorded.
First approach to spectroscopy usage for UFO phenomenon study
October 25th, 2009 (update December 13th ,2010)
A summary paper of essential knowledge on diffraction gratings.
 |
|
 |
Dec 13th, 2010 |
| Using spectroscopy for the study of Unidentified Flying Objects | |
How to build a diffraction grating kit for a mobile phone imaging device
October 18th, 2009
This document outlines a step by step method to build a small device allowing adapting a diffraction grating on your mobile phone lens.
| |
|
|
Oct 18th, 2009 |
| How to make a diffraction grating kit for a mobile phone imaging device | |
First real-life conditions spectrum shots
March 24th, 2009
A paper about real condition night shots of a bright object aloft using an optical diffraction grating, and the analysis of the captured spectrum. Read more.
Quick guide to diffraction gratings
September 30th, 2007
Quick guide (3 PDF pages) to optical diffraction gratings and spectroscopic caps for cameras and imaging devices : where to get them, how to mount and use them (soon in english).
 |
|
 |
Sept 30th, 2007 |
| Information sur les réseaux de diffraction | |
Optical diffraction grating
June 19th, 2007
Here is the first explanatory work about diffraction gratings caps for photo cameras :
| |
|
|
June 19th, 2007 |
| Using spectroscopy for the study of Unidentified Flying Objects (UFOs) | |
Some spectral emissions
September 30th, 2007
Some videos explaining experiences allowing revealing spectral emissions from various typical light sources :
|
|
|
|||||||||||||||
How to make a high precision spectroscope device
September 30th, 2007
Video showing the construction of a spectroscope :
|
|||||
